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@uitrit ftntes-littent Slgffitel L To ALL ivi-10M ITiMAY eoN'eERNT,

Louis s. vnonni-Ns,or. New YonKf-NQ'V' Letters Patent No. 78,235', dated .M'ay `26, 1868.?

.-IMPnoiz-EMEMIAGRIGULTUBAL effetti-.Bottines Be it known that -I, Louis S. RoBBINs, o f the city, coun ty, and State. @New Yorlr, have'invented anew and improved Agricultural Stcam-Boiler; and I de horcby declare that the following isafull, clear-,nud e'xet L description thereof', u'hich willl enable 4others skilled in'the nlrt to make and use thosame, Y1et`erenee-being had to the accompanying drawings," forming part ofthis specification.'

' ''h invention' relates to improroments in boilcrs which are used-for agricultural purposes, as for steaming walls andbottoms of the fire-box;

orboiling feedfor cattle, horses, or other live stock, heating water, 'and generating steam for otherplirposes; and itz-consists intheconstruction ond nrrangementof the various parts hereinafter morefully described. The drawing-4 f" f 'I i f l. i

' Figure' 1, isnverticals'cetion of the bbiler, surrounded by itsensing, and showing thegoneral*arrangements of the parts connected therewitbigtheseotion being through the line a: zffig'.- 2;V

Figure 2 is a vertical 'section-of rg.,1 th 1lough the lineage 'Figure' iscn outside view, and v f I ,-r Figure 4'is aiiotail view :of the v cuum and'SafetyV-valve.'

Siniilap-fletters-9f referenceindcnto cerresspondip'gplurts-',

A is the easing' around-the boileiywith theirediex'in its base, and a sunken ash-pit beneath the. grate-barst;

B is the boiler-,'vvlrich .isdcylindrical in forni, with a crowning or concave bottom7 and with a houiisphericnl cap or cover marked. i I Y Y D is' the lire-box.

E is the ash-pit. Y

F represents the lire-flue around the boiler. i

G represcntstbc door for the introduction ofthe fuel.'

On the inside' of the fire-box D, to protect'the casnga'ml {ire-box from injury from tlic'hent' of the fire .f

place corrugated plates of metal, H, as seen in the drawing, fig. 1. h

These corrugated plates prevent injurious contact between the inccmiescent` fuel 'andi the @more destnuctible B' represents a deecting-platein the -ue F, to prevent'the products of'v combustion. from passing directly" into the'cl1imney=pipe C. This plate'is supported by the roil'D" frtriny thebgttom oi' tlie` uc:F.' 'p A ,The bottom oi' the boilcrl is made arching orsconeave, for the purpose of more fully concentrating and confining the heat, :is well: as to increase the f resurface, and also so' that the contents of" the boiler Xmaj7 be drawn oli` by a vpipe attached near the bottom, and in such a position that the Vsaid pipe-maybeproperly pro tectefl from the intense heat.

In theordina'ry cauldron-kettle boiler, with its convex bottom, this cannotbe accomplished with any degree uniform quantity of'irater while steam is being generated.

of success.

J is the supply-pipe attached tc the boiler', as seen in the drawing, ,wit-litho inner end, which passes through the u'e F,'prote cted by a cast-iron sleeve, I or a sleeve made of any incombustibe material.

L is a branch-pipe, with a 'c ock, tbrou'gh which the entire contents o'f the boiler may be drawn olli The L supply-pipe U extends upward, and connects ,n'itha water-reservoir, m, near the top of` the casing. r T-bc water in the reservoir will be more or less heated from the easing, and thereby fitted for the boiler. 'n' is a stop-cook totshut o the iva'ter from the boiler.' This cock maybe .partially pen, so as to supply a O is a. tcst-ceclc for determining the quantity-'of' wateif'ilizthe flange, p, with concave channel, whichts inte'yand on te a cbrresponding'ilangc, gpo theboiler, as seen in the V drawing. Lend or other suitable packing is placed between the flanges', and the tiro are secured tightly together,

by scrcwbolts, as seen.

R isthe pipe through which steam is discharged for steaming vegetables cr boiling lin separate vessels; as

barrelsftanks, die.

is a combined vacuum und safety-yalve, the tubeqof ujliieh'pusscs loosely through the cap into the steam. spz'i'c', of the boiler. l v l .v, -v

T is u'spriug-vulvc attached to a. collar on the lower end cf the tube S. 'llhic'vulve closes the end of the tube by the pressure'of thespring, except wher: u vucuuu'i is produced inthe boiler; in that cnsethe pressure o' the atmosphere forces it opeu f or the'a'dmssio'n of urzr' Itwll be noticed thaltthe lower portion oi' the tube is somewhat tuperiug, us seen ,more distinctly in the detached view, fig..4, at

y The manner in which it operates as u safety-vulve is us follows: As seen lin the drawing, the ilunge V o" the tube S restson the cup.l w w reprcseu'tweights orrings on the tube, which. muy be'more or less-in humber or weight. Wheuthe pressure in the boiler is suiiiciently high t-ojruise the4 tube undl weights upon it, the tube ivill b-elifted up through'the orifice in the cap till the tapering portion, u, reachesy the orifice, when steam willA be discharged through the annular `opening thus formed, which immediately-relieves the pressure, uudthe tube drops buck toits place. Elastic packing is p laeed between the flange or collar and the cup to prevent the 'leakage of steam. g 4

. ,Having thus described myinventiou, what Ieleim as new, and desire to secure by Letters Patent, is.

Il. The corrugated plates H in the {ire-box, substantially as und-forthe p'urpos'evsdescrbed. 2. I claim the protecting-sleeve K on the pipe J, substantially usdescribcd. h '8. I cluim the supply-pipe J', providedovith the cocks n, o, and L, und ,connectedV with the water-reservoir m, substantially asdescribed. l v

4. I'claim the method of forming the joint between the cu-p C und the boiler, substantially us described.

5; I claim the combined vuuum vund sufcty-va-lvqconstructed.und .operutiug Substantially us show x und v i described, for the purposes specified.

LOUIS S. ROBBINS. Witncssesz WM. F. McNAMARA,

Amex. F. ROBERTS. 

